For me, the key pieces that separate a good brand from a cheaper brand is how well the headlight/tailight covers are made/assembled.
I know that you have a lot more experience than I do (at least your sample size used to be a lot larger than what I have now), and that may work in your case, but the way I see it, this tactic of discerning the quality between respective makers doesn’t work out as often the higher-up you venture into the hierarchy of pre-made diecast cars. I have a resin Frontiart One-77 that opens fully and costs an astronomical sum (~300 USD*), and when I bought it the clear headlight covers are already kinda yellow, and when I searched for
photos of others’ examples of the model I seem to not be alone. Another model I have, which is
the Minichamps 300 SL Roadster I posted in the thread not too long ago, has, as I found out later, some pretty wobbly headlight and taillight covers (not the chromed bezels, the clear covers). With that said though, the PMA/Minichamps has some pretty nice chrome finish, and the interior and engine doesn’t look too bad for a ~150 EUR diecast. Meanwhile, I also have a Norev SLS AMG that I paid ~100 USD* for, and
its taillights doesn’t look too bad for something of that price from what I can remember, but the engine bay and interior material is abysmal. And don’t get me started on the Frontiart’s engine bay, as the carbon fibre and general craftsmanship there really is something to wax lyrical about

I can’t take pics without the base attached though, so I haven’t taken any yet.
So I suppose most of the time each model has its own places where it’s brilliant and where it’s lacklustre, provided you bought it not too far from the MSRP.
Anyway, I don’t want to sound sententious; I just wanted to elicit some discussion. And some advice on how to detach my 300 USD Frontiart from its base
*Then again, I did buy both of these second-hand, which could explain the One-77’s yellowed covers… 😅